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Hydrotreating process

A compound and raw material technology, applied in the field of hydrorefining, can solve problems such as restricted fluid and catalyst optimal process design

Inactive Publication Date: 2007-10-24
HALDOR TOPSOE AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantage of this method is the need to deal with all the process gases, which are basically free of color components, which obviously limits the optimal process design for fluid and catalyst contact

Method used

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  • Hydrotreating process

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Embodiment Construction

[0012] When operating in accordance with a general embodiment of the present invention, the effluent from the first hydroprocessing step includes a gas phase and a liquid phase. The gas phase includes mainly C1-C4 hydrocarbons and hydrogen, with minor amounts of ammonia and hydrogen sulfide formed in the first hydrotreating step. The liquid phase includes C5 and higher hydrocarbons. In a separator located upstream of the second hydrotreating step, the bulk of the gas phase is separated from the effluent. The remaining mixed gas-liquid phase is subjected to a second hydrotreating step to remove colored components. The gas-to-liquid volume ratio in the mixed phase depends on the content of colored components in the liquid phase and the amount of hydrogen required to hydrogenate these components in the second hydrotreating step. Conventionally, the above volume ratios can be adjusted by controlling the pressure drop across the catalyst bed in the second hydrotreating step by me...

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Abstract

Process for the removal of coloured compounds in a hydrocarbon feedstock comprising the steps of hydrotreating the feedstock in presence of a first hydrotreating catalyst under conditions being effective in hydrogenation of hydrogenable compounds being present in the feedstock and hydrotreating an effluent from the first hydrotreating step in a second catalytic hydrotreating step being carried out in a second hydrotreating reactor at hydrotreating conditions, wherein the effluent from the first hydrotreating step is separated into a gas phase and a mixed gas and liquid phase prior to the second hydrotreating step, and the mixed phase is hydrotreated in the second hydrotreating step without further addition of hydrogen.

Description

technical field [0001] The present invention relates to the hydrorefining of hydrocarbon feeds containing organosulfur and nitrogen compounds. In particular, the present invention relates to a process for removing coloured components from hydrocarbon streams, especially diesel fuel streams, thereby significantly improving the colour of the product. Background technique [0002] Hydroprocessing of hydrocarbons in refineries removes and disposes of large quantities of sulfur and nitrogen compounds so that when these hydrocarbons are combusted, SO X and NO X The impact on the environment can be greatly reduced without the need for expensive exhaust gas treatment devices for each consumer. The growing demand for clean diesel fuels has also resulted not only in increased process severity to keep the fuel low in sulphur and nitrogen, but also in more difficult-to-convert feedstocks (higher final boiling points, cracked feedstocks) The ability to perform hydroprocessing. It is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/04C10G45/00C10G67/02
CPCC10G65/04C10G45/00C10G67/04
Inventor R·布雷维克J·莫根森K·G·克努森J·弗里斯伯格B·萨鲁普
Owner HALDOR TOPSOE AS